公开(公告)号：US20240294822A1

公开(公告)日：2024-09-05

申请号：US18117171

申请日：2023-03-03

Applicant: Saudi Arabian Oil Company

Inventor： Limin Xu ,  Ming Han ,  Tianping Huang

IPC: C09K8/584

CPC classification number: C09K8/584

Abstract: This disclosure relates to thermal stimuli-responsive surfactant mixtures useful for reducing water/oil interfacial tension at high temperatures and increasing water/oil interfacial tension at low temperatures. The disclosure also relates to methods of using the surfactant mixtures for enhanced oil recovery applications.

公开(公告)号：US20240124762A1

公开(公告)日：2024-04-18

申请号：US18520092

申请日：2023-11-27

Applicant: Saudi Arabian Oil Company

Inventor： Ming Han ,  Limin Xu

IPC: C09K8/584

CPC classification number: C09K8/584

Abstract: A process for reducing the interfacial tension between a hydrocarbon fluid and a surfactant mixture during chemical enhanced oil recovery includes introducing a surfactant mixture solution comprising an anionic surfactant, a cationic surfactant, a nonionic surfactant, a brine solution, and a co-solvent to a hydrocarbon-bearing reservoir under conditions of a salinity of greater than or equal to 50,000 mg/L, a hardness of greater than or equal to 2,500 mg/L, and a temperature of greater than or equal to 90° C., thereby reducing the interfacial tension at a liquid-liquid interface of the hydrocarbon fluid and the surfactant mixture solution. The anionic surfactant comprises organo sulfate. The cationic surfactant comprises quaternary ammonium, brominated trimethylammonium, chloride trimethylammonium, or combinations thereof. The nonionic surfactant comprises polyoxyethylene fatty acid ester, phenylated ethoxylate, or combinations thereof.

公开(公告)号：US11254855B2

公开(公告)日：2022-02-22

申请号：US16683761

申请日：2019-11-14

Applicant: Saudi Arabian Oil Company

Inventor： Limin Xu ,  Ming Han ,  Alhasan Fuseni ,  Dongqing Cao

IPC: C09K8/584 ,  E21B43/16

Abstract: Surfactant mixtures include a cationic surfactant, an anionic surfactant, and a nonionic surfactant in a brine solution. The cationic surfactant may include at least one quaternary ammonium, at least one brominated trimethylammonium, or combinations thereof. The anionic surfactant may include at least one organosulfate. The nonionic surfactant may include the nonionic surfactant comprised of a polyoxyethylene fatty acid ester, a phenylated ethoxylate, or combinations thereof. The surfactant mixtures may be incorporated into methods for reducing the interfacial tension between the surfactant mixture and oily fluids during chemical enhanced oil recovery. The methods for reducing the interfacial tension may include introducing the surfactant mixture comprising a cationic surfactant, an anionic surfactant, and a nonionic surfactant in a brine solution to a hydrocarbon-bearing reservoir, thereby reducing the interfacial tension at a liquid-liquid interface of the surfactant mixture and the fluid.